What does the internal oblique muscle do?
Function. Along with other abdominal wall muscles, the internal oblique muscle flexes and bends the trunk, assists forced expiration by depressing the lower ribs, and helps to maintain intra-abdominal pressure in defecation, micturition and childbirth.
What does internal oblique mean in anatomy?
Internal oblique. Internal abdominal oblique is a muscle found on the lateral side of the abdomen. It is broad and thin. it forms one of the layers of the lateral abdominal wall along with external oblique on the outer side and transverse abdominis on the inner side. Its fibers are obliquely oriented hence the name.
Where is the oblique muscle in the body?
anterolateral abdominal wall
The oblique muscle group is located in the anterolateral abdominal wall. We also have a paired inferior oblique muscle and superior oblique muscle that are part of the extrinsic muscles of the eye orbit.
What Innervates the internal oblique?
The internal oblique is innervated by both the lower intercostal nerves as well as branches of the lumbar plexus (iliohypogastric nerve and ilioinguinal nerve).
What type of muscle is internal oblique?
Anatomical terms of muscle The abdominal internal oblique muscle, also internal oblique muscle or interior oblique, is an abdominal muscle in the abdominal wall that lies below the external oblique muscle and just above the transverse abdominal muscle.
What is the internal oblique origin?
| Abdominal internal oblique muscle | |
|---|---|
| Origin | Inguinal ligament, Iliac crest and the Lumbodorsal fascia. |
| Insertion | Linea alba, Pectineal Line of Pubis (via Conjoint tendon) and ribs 10-12. |
| Artery | Subcostal arteries. |
| Nerve | Thoracoabdominal nn. (T7-T11), Subcostal n. (T12), Iliohypogastric n. (L1) and Ilioinguinal n. (L1) |
What is the function of the internal abdominal oblique?
This muscle supports the abdominal wall, assists in forced respiration, aids in raising pressure in the abdominal area, and rotates and turns the trunk with help from other muscles. The internal abdominal oblique muscle is an opposing force to the diaphragm, reducing upper chest cavity volume during exhalation.
What are the obliques?
The obliques are stomach muscle groups, the outside and internal obliques. This permits for trunk flexion and rotation. The thickest oblique is the outside indirect, which extends from the lower ribs to the iliac crest. The inner indirect muscle is placed underneath the outside muscle and begins on the iliac crest before reaching the pubic bone.
What are the internal and external oblique muscles?
Internal abdominal oblique muscles are called “same side rotators.” The right internal oblique works with the left external oblique, and vice versa, when flexing and rotating the torso. Last medically reviewed on December 17, 2014
Where does the internal oblique end?
Internal oblique. The internal abdominal oblique muscle ends at the bottom edge of the rib cage, the rectus sheath (fibrous tissue that covers the abdominal muscles), and the pubic crest (an area in the lower-front of the pelvis).